TITLE

Influence of the focusing f number on the heating regime transition in laser absorption waves

AUTHOR(S)
Mori, Koichi; Komurasaki, Kimiya; Arakawa, Yoshihiro
PUB. DATE
November 2002
SOURCE
Journal of Applied Physics;11/15/2002, Vol. 92 Issue 10, p5663
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Laser plasma was produced in air atmosphere using a transversely excited atmospheric CO[SUB2] pulse laser; the influence of the focusing f number (≡ focal length/laser beam diameter) on the threshold of a heating regime transition in laser absorption waves was then investigated. As a result, when the laser energy was 10 J/pulse, the transition threshold was 2.6 ± 0.4 MW/cm[SUP2] with f = 1.1 optics and 3.7 ± 0.4 MW/cm[SUP2] with f = 2.2. The difference was explained in terms of the front area and absorption layer thickness in the laser supported detonation regime.
ACCESSION #
7711513

 

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